Clamping device for VFD display screen test
By designing a clamping device that uses a servo motor to drive the rotating and fixed plates to clamp the glass, the problem of poor glass stability in VFD display testing is solved, and the accuracy of test results is improved.
Patent Information
- Application Number
- CN202423031679.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-09
AI Technical Summary
During VFD display testing, the poor stability of the glass affects the accuracy of the test results.
A clamping device is used, which clamps the edge of the glass through the coordinated movement of multiple moving rods and clamping parts. A servo motor drives the rotating plate and the fixed plate to clamp the glass, ensuring the stability of the glass.
This improves the stability of the glass during the testing process, thereby increasing the accuracy of the test results.
Smart Images
Figure CN223551773U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display screen clamping devices, and more particularly to a clamping device for testing VFD display screens. Background Technology
[0002] Currently, a VFD (Vacuum Fluorescent Display) is a type of display that uses vacuum fluorescent technology. It consists of many small light-emitting units, each of which is a tiny glass tube filled with gas, mercury, and electrodes. When an electric current passes through the electrodes, the mercury in the gas is excited and emits ultraviolet light, which is absorbed by the phosphor and converted into visible light, thus producing a bright spot.
[0003] VFD displays are generally brighter and clearer than LCD displays and can operate over a wider temperature range. They are also easier to read than LED displays because their characters and numbers are sharper and more clearly defined. VFD displays are commonly used in industrial control, in-vehicle entertainment systems, and home audio systems.
[0004] VFD displays typically use glass as a substrate. Glass has excellent transparency and chemical stability, making it ideal as a base material for displays. During the manufacturing process of a VFD display, a conductive material is coated onto the glass substrate to form the display area and conductive paths.
[0005] During the production of VFD displays, the circuitry on the glass needs to be tested. This testing typically uses probes to examine the circuitry. Because these probes are thin, poor glass stability during testing can easily affect the test results. Utility Model Content
[0006] In order to improve the stability of the glass during testing and thus improve the accuracy of the test results, this application provides a clamping device for testing VFD displays.
[0007] This application provides a clamping device for testing VFD displays, which adopts the following technical solution:
[0008] A clamping device for testing a VFD display screen includes a frame with multiple movable rods slidably connected to the frame. Each movable rod is located on the same plane. One end of each movable rod is connected to a clamping part for clamping the display screen. The clamping part is connected to a rotating component for opening and closing the clamping part.
[0009] By adopting the above technical solution, before testing the circuit on the glass, the rotating part opens the clamping part, and multiple moving rods slide close to the periphery of the glass. The rotating part closes the clamping part, so that the clamping part clamps the edge of the glass, and each moving rod slides away from the periphery of the glass. This can clamp the glass, thereby improving the stability of the glass during testing and improving the accuracy of the test results.
[0010] Preferably, the clamping part includes a fixed plate and a rotating plate. The fixed plate is horizontally arranged and fixed to the end of the moving rod. The rotating plate is located above the fixed plate and rotatably connected to the end of the moving rod. The rotating member is connected to the rotating plate and is used to rotate the rotating plate so that the end of the rotating plate away from the moving rod moves away from or closer to the fixed plate.
[0011] By adopting the above technical solution, the rotating component rotates the rotating plate so that one end of the rotating plate is away from the fixed plate, and the moving rod slides close to the periphery of the glass until one end of the rotating plate and one end of the fixed plate are respectively located on both sides of the glass. The rotating component rotates the rotating plate so that one end of the rotating plate is close to the fixed plate, thereby clamping the glass by the rotating plate and the fixed plate.
[0012] Preferably, the rotating component is a first servo motor, and the output shaft of the first servo motor is connected to the rotating plate.
[0013] By adopting the above technical solution, the first servo motor can drive the rotating plate to rotate in both directions, thereby driving the end of the rotating plate away from the moving rod to move away from or closer to the fixed plate. The driving method is simple and convenient.
[0014] Preferably, the frame is connected to a plurality of drive components, each drive component being connected to each of the moving rods, and the drive components being used to move the moving rods along the length direction of the moving rods.
[0015] By adopting the above technical solution, each driving component can drive each moving rod to move, thereby enabling each moving rod to move closer to or further away from the glass.
[0016] Preferably, the driving assembly includes a lead screw, a guide rod, a slider, and a second servo motor. The length directions of the lead screw and the guide rod are both consistent with the length direction of the moving rod. The output shaft of the second servo motor is connected to one end of the lead screw. One end of the slider is slidably sleeved on the guide rod, and the other end of the slider is threaded onto the lead screw. The moving rod is connected to the slider.
[0017] By adopting the above technical solution, the second servo motor can drive the lead screw to rotate in both directions, thereby driving the slider to slide back and forth on the guide rod. The slider can drive the moving rod to move, thereby allowing each moving rod to move closer to or away from the glass.
[0018] Preferably, a buffer layer is provided on the side of the fixed plate and the rotating plate that are close to each other.
[0019] By adopting the above technical solution, both the fixed plate and the rotating plate contact the glass through the buffer layer when clamping the glass, which can minimize damage to the glass during clamping and thus protect the glass.
[0020] Preferably, the frame is connected to a placement plate, the placement plate is horizontally arranged, the top of the placement plate is provided with multiple limiting strips, each of the moving rods is distributed around the periphery of the placement plate and the clamping part is arranged close to the placement plate.
[0021] By adopting the above technical solution, the placement plate can support the glass. After the glass is placed on the placement plate, the edges of the glass are limited by the limiting strips. The moving rod then moves closer to the glass and clamps the glass by the clamping part, which makes it easier for the clamping part to clamp the glass.
[0022] Preferably, the limiting strip is provided with a protective layer.
[0023] By adopting the above technical solution, after the glass is placed on the placement plate, the limiting strip contacts the glass through the protective layer, which can minimize the possibility of the limiting strip damaging the glass, thereby protecting the glass.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] 1. Before testing the circuit on the glass, the rotating part opens the clamping part, and multiple moving rods slide close to the periphery of the glass. The rotating part closes the clamping part, so that the clamping part clamps the edge of the glass, and each moving rod slides away from the periphery of the glass. This can clamp the glass, thereby improving the stability of the glass during testing and improving the accuracy of the test results.
[0026] 2. The rotating component rotates the rotating plate so that one end of the rotating plate is away from the fixed plate, and the moving rod slides closer to the periphery of the glass until one end of the rotating plate and one end of the fixed plate are respectively on both sides of the glass. The rotating component rotates the rotating plate so that one end of the rotating plate is close to the fixed plate, thereby clamping the glass by the rotating plate and the fixed plate.
[0027] 3. The placement plate can support glass. After the glass is placed on the placement plate, the edges of the glass are limited by the limiting strips. The moving rod then moves closer to the glass and clamps the glass through the clamping part, which makes it easier for the clamping part to hold the glass. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of a clamping device for testing a VFD display screen according to an embodiment of this application.
[0029] Figure 2 This is a schematic diagram of the overall structure of a clamping device for testing a VFD display screen according to an embodiment of this application, used to show the state of the display screen placed on the placement plate.
[0030] Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle.
[0031] Figure 4 This is a top view of a clamping device for testing a VFD display screen according to an embodiment of this application.
[0032] Figure 5 It is along Figure 4 A schematic diagram of the cross-sectional structure of line AA in the middle.
[0033] Explanation of reference numerals in the attached figures:
[0034] 100. Rack;
[0035] 200. Moving rod; 201. Rotating component;
[0036] 300. Clamping part; 301. Fixing plate; 302. Rotating plate; 303. Buffer layer;
[0037] 400. Drive assembly; 401. Lead screw; 402. Guide rod; 403. Slider; 404. Second servo motor;
[0038] 500, Placement plate; 501, Limiting strip; 502, Protective layer. Detailed Implementation
[0039] The present application will be further described in detail below with reference to all the accompanying drawings.
[0040] This application discloses a clamping device for testing a VFD display screen. (Refer to...) Figure 1 and Figure 2 The clamping device for testing VFD displays includes a frame 100 and multiple moving rods 200. Each moving rod 200 is slidably connected to the frame 100, and each moving rod 200 is connected to a clamping part 300. The clamping part 300 is used to clamp the glass to improve the stability of the glass during testing and thus improve the accuracy of the test results.
[0041] Reference Figure 1 , Figure 2 and Figure 3 The frame 100 is connected to a placement plate 500, which is horizontally positioned and used to place glass. Limiting strips 501 are connected to the top of both ends of the placement plate 500 along its length. The length of the limiting strips 501 is aligned with the width of the placement plate 500. A protective layer 502, made of rubber, is provided on one side of each limiting strip 501 near the middle of the placement plate 500. The glass is rectangular; after being placed on the placement plate 500, both ends of the glass contact the two protective layers 502 along its length.
[0042] Reference Figure 2 and Figure 4There are four movable rods 200, all distributed on the same plane and with their length direction aligned with the width direction of the placement plate 500. The four movable rods 200 are divided into two groups, each group consisting of two movable rods 200. The two groups of movable rods 200 are distributed on both sides of the placement plate 500 along its width direction, and the two movable rods 200 in each group are spaced apart along the length direction of the placement plate 500. The ends of the four movable rods 200 are all positioned near the four corners of the glass.
[0043] Reference Figure 3 and Figure 5 A clamping part 300 is connected to the end of the moving rod 200 near the glass. The clamping part 300 includes a fixing plate 301 and a rotating plate 302. The fixing plate 301 is horizontally arranged and fixed to the end of the moving rod 200. The rotating plate 302 is located above the fixing plate 301. Both the top of the fixing plate 301 and the bottom of the rotating plate 302 are provided with a buffer layer 303, which is made of rubber. The rotating plate 302 is rotatably connected to the end of the moving rod 200 through a rotating component 201. The rotating component 201 is a first servo motor. The housing of the first servo motor is connected to the moving rod 200, and the output shaft of the first servo motor is connected to the rotating plate 302. The first servo motor drives the rotating plate 302 to rotate so that the end of the rotating plate 302 away from the moving rod 200 moves away from or closer to the fixing plate 301.
[0044] Reference Figure 1 and Figure 4 The frame 100 is connected to multiple drive assemblies 400. There are four drive assemblies 400, each connected to one of four moving rods 200. The moving rods 200 are slidably connected to the frame 100 via the drive assemblies 400. Each drive assembly 400 includes a lead screw 401, a second servo motor 404, a guide rod 402, and a slider 403. The housing of the second servo motor 404 is connected to the frame 100, and the output shaft of the second servo motor 404 is connected to one end of the lead screw 401. The lead screw 401 is rotatably connected to the frame 100. The length directions of the guide rod 402 and the lead screw 401 are aligned with the length direction of the moving rods 200. The guide rod 402 is fixed to the frame 100. One end of the slider 403 is slidably sleeved on the guide rod 402, and the other end of the slider 403 is threaded onto the lead screw 401. The moving rods 200 are connected to the slider 403.
[0045] The implementation principle of a clamping device for testing a VFD display screen according to an embodiment of this application is as follows: After the glass is placed horizontally on the top of the placement plate 500, the limiting strip 501 limits the glass. The rotating component 201 drives the rotating plate 302 to rotate away from the fixed plate 301. The second servo motor 404 drives the lead screw 401 to rotate forward so that the slider 403 drives the moving rod 200 to move closer to the glass. After the moving rod 200 moves to the point where the rotating plate 302 is above the glass and the fixed plate 301 is below the glass, the rotating component 201 rotates the rotating plate 302, thereby clamping the glass between the fixed plate 301 and the rotating plate 302. The second servo motor 404 drives the lead screw 401 to rotate in reverse so that the slider 403 drives the moving rod 200 to move away from the glass, thereby improving the stability of the glass and thus improving the accuracy of the test results.
[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A clamping device for testing a VFD display screen, characterized in that: Includes a frame (100), which is slidably connected to a plurality of movable rods (200), each of the movable rods (200) being located on the same plane. One end of each movable rod (200) is connected to a clamping part (300) for clamping the display screen. The clamping part (300) is connected to a rotating member (201), which is used to open and close the clamping part (300).
2. The clamping device for testing VFD displays according to claim 1, characterized in that: The clamping part (300) includes a fixed plate (301) and a rotating plate (302). The fixed plate (301) is horizontally arranged and fixed to the end of the moving rod (200). The rotating plate (302) is located above the fixed plate (301) and rotatably connected to the end of the moving rod (200). The rotating member (201) is connected to the rotating plate (302). The rotating member (201) is used to rotate the rotating plate (302) so that the end of the rotating plate (302) away from the moving rod (200) moves away from or closer to the fixed plate (301).
3. The clamping device for testing VFD displays according to claim 2, characterized in that: The rotating component (201) is a first servo motor, and the output shaft of the first servo motor is connected to the rotating plate (302).
4. The clamping device for testing VFD displays according to claim 1, characterized in that: The frame (100) is connected to a plurality of drive components (400), each drive component (400) is connected to each of the moving rods (200), and the drive component (400) is used to move the moving rod (200) along the length direction of the moving rod (200).
5. The clamping device for testing VFD displays according to claim 4, characterized in that: The drive assembly (400) includes a lead screw (401), a guide rod (402), a slider (403), and a second servo motor (404). The length directions of the lead screw (401) and the guide rod (402) are both consistent with the length direction of the moving rod (200). The output shaft of the second servo motor (404) is connected to one end of the lead screw (401). One end of the slider (403) is slidably sleeved on the guide rod (402), and the other end of the slider (403) is threaded onto the lead screw (401). The moving rod (200) is connected to the slider (403).
6. The clamping device for testing VFD displays according to claim 2, characterized in that: A buffer layer (303) is provided on the side of the fixed plate (301) and the rotating plate (302) that are close to each other.
7. The clamping device for testing VFD displays according to claim 1, characterized in that: The frame (100) is connected to a placement plate (500), the placement plate (500) is horizontally arranged, and a plurality of limiting strips (501) are provided on the top of the placement plate (500). Each of the moving rods (200) is distributed around the placement plate (500) and the clamping part (300) is located close to the placement plate (500).
8. The clamping device for testing VFD displays according to claim 7, characterized in that: The limiting strip (501) is provided with a protective layer (502).